Bear in mind, when entering the Immigration you will be asked the address of your hotel/accommodation so remember it, or have a booking confirmation ready.
Book accommodation few months in advance, so you can find some Airbnb accommodation on Manhattan, for $75.
If not on Manhattan, book accommodation in Long Island, Brooklyn Heights or Williamsburg, because there’s a direct metro line with only few stations to Manhattan.
Buy food at the supermarket if you want to save some money.
Buy 7 day unlimited metro pass for $30, because one way ticket is $2,75.
If you are a smoker, bring cigarettes with you, a package of Marlboro Gold is $14.
Admission to The Museum of Modern Art is free for all visitors every Friday evening, 4:00–8:00 p.m., during UNIQLO Free Friday Nights.
Your checked baggage will be searched, while leaving The States.